I think I figured out how to manage the Air Hunger problem. For those that don't have the problem, it is an inability to get oxygen into the blood stream with a deep breath. This occurs at rest or sleeping. It is a constant problem every day. I think the root problem is that the blood becomes too acidic hence it can't either absorb oxygen or unable to release carbon dioxide. I notice the problem becomes worse when I eat protein. The solution is to alkalize the blood by eating an alkaline food. The blood responds pretty quickly after the food is eaten so you can do a lot of experiments in a short time. Try eating some protein and see if the air hunger symptoms worsen. I would give whatever you eat time to digest before trying another experiment. Some alkanizing foods are Tomato (maybe have some tomato soup), spinach, lemon Here is one link to a guide to some acidic, neutral and alkaline foods. http://www.ctds.info/acidic-foods.html There have been studies on yawning that say yawning has nothing to do with the respiration. I think those are wrong. Many animals yawn. I think it is the body wanting oxygen. While your having air hunger problems, try yawning and then taking a deep breath. I have noticed that I am able to take a deep breath of air that oxygenates my blood. Maybe the yawning is expelling carbon dioxide making room for oxygen. Not sure. Btw I tried the Betaine HCL but didn't help. Please experiment with this and give me some feed back in what your response was to the alkaline and acidic foods.